Efficient photocatalytic degradation of Rhodamine B catalyzed by SrFe2O4/g-C3N4 composite under visible light.

In this work, visible light-responsive composite photocatalysts SrFe 2 O 4 /g-C 3 N 4 were simply prepared by ultrasonically dispersing and refluxing the mixture of SrFe 2 O 4 and g-C 3 N 4. The as-prepared composites exhibited remarkably higher photocatalytic activity than both pristine SrFe 2 O 4 and g-C 3 N 4 for degradation of Rhodamine B driven by visible light. Especially, the most efficient catalyst SrFe 2 O 4 /g-C 3 N 4 (1:1) with 1:1 mass ratio of SrFe 2 O 4 to g-C 3 N 4 can completely degradate 100 mL 10 mg/L RhB in 40 min. Furthermore, the catalyst could be magnetically separated easily for reuse and no obvious loss of activity was observed when reused in five consecutive runs. Visible light-responsive composite photocatalysts of strontium ferrite/graphitic carbon nitride, SrFe 2 O 4 /g-C 3 N 4 , were simply synthesized by ultrasonically dispersing and refluxing the mixture of SrFe 2 O 4 and g-C 3 N 4. The as-prepared composites were well characterized and their catalytic performances for photocatalytic Rhodamine B degradation were evaluated under visible-light irradiation. The composites catalysts exhibited remarkably higher activities than both pristine SrFe 2 O 4 and g-C 3 N 4 endowed by synergetic effect between the two moieties. Especially, the most efficient catalyst SrFe 2 O 4 /g-C 3 N 4 (1:1) with 1:1 mass ratio of SrFe 2 O 4 to g-C 3 N 4 can completely degradate RhB in 100 mL aqueous solution with concentration of 10 mg/L in 40 min. Furthermore, the catalyst can be facilely separated by external magnet for recycling and almost no decrease in its catalytic activity was observed after five runs reuse. [ABSTRACT FROM AUTHOR]